Adjustable plug for shotgun shell chamber



FIG. 1 is a perspective view of an adjustable plug for shotgun shell chamber showing my new design, the shotgun being shown in broken lines for illustrative purposes only;

FIG. 2 is an enlarged perspective view thereof; and,

FIG. 3 is a rear perspective view. 

The ornamental design for an adjustable plug for shotgun shell chamber, as shown and described. 